Wind-Up Dual-Scale Fiberglass Tape Measure, 100 ft. / 30 m Glassware Students take their time reading

Students take their time reading band positions and comparing them to atomic line spectra without a countdown

a green line near 501

The Laser Ray Box and Lenses set lets students see light paths instantly and investigate reflection

simple setup: Demonstrates conservation of energy and angular momentum with a single twist

Wind-Up Dual-Scale Fiberglass Tape Measure, 100 ft. / 30 m Glassware Students take their time readingA durable ABS plastic housing, ergonomic design, and high contrast markings will make this your go to measuring device for years to come. The thick, nylon reinforced fiberglass tape stretches for 100 feet or 30 meters, with standard and metric units on opposite sides.